Duet smart effector directive drive on E3d titan aero

johndeere6110

Hello are you still working on this smart effector mount?
I like the idea

Greetings andy

giostark

@johndeere6110
The idea is good but as it it is now could have some downsides.
That fan is not efficient and also a Noctua of the same size don't make a change.
To put the fan for cool down the part could be a little tricky.
Probably the stepper should be tinner for light the total head weight. (vibration could became an issue).
The solution is really interesting. I could give it a try or implement it a little if I could have the draw.

o_lampe

@johndeere6110
A direct drive extruder on a Delta printer is always a compromise. You use a lightweight extruder to take advantage of the Deltas inherent speed. But then you can't extrude fast enough.
Or you put a full grown extruder under the effector and see how the extra-weight forces you to either slow down the printer or have low quality results.
Finding the right balance is tricky and eats up most of the benefits a Delta printer can have against other printer concepts. But the calibration issues that come with the Delta are still existing...

Better use a Delta for other things than printing, like laser-engraving or pick&place stuff.
Only my 2 cent

dc42

@o_lampe said in Duet smart effector directive drive on E3d titan aero:

A direct drive extruder on a Delta printer is always a compromise. You use a lightweight extruder to take advantage of the Deltas inherent speed. But then you can't extrude fast enough.
Or you put a full grown extruder under the effector and see how the extra-weight forces you to either slow down the printer or have low quality results.

The new lightweight extruders such as the Orbiter are very promising,

But the calibration issues that come with the Delta are still existing...

Calibration is trivial if the geometry is accurate. The Smart Effector along with Haydn's rods solves a large part of that probem.

Better use a Delta for other things than printing, like laser-engraving or pick&place stuff.
Only my 2 cent

My go-to 3D printer (out of the five that I have) is the delta.

o_lampe

@dc42 said in Duet smart effector directive drive on E3d titan aero:

The new lightweight extruders such as the Orbiter are very promising,

I agree, they seem the best match right now. ( the above Aero example not so much)

@dc42 said in Duet smart effector directive drive on E3d titan aero:

Calibration is trivial if the geometry is accurate.

That's what I meant. They are a 'Diva' regarding accuracy and frame rigidity. I tried my best and spent a lot of money on it. But I have to calibrate it every time.
OTOH, I can switch on my CoreXY and start printing, no dropped bed, no problems with 1st. layer.
Peace of mind vs. elegant design, pick your favourite...
Again, just my 2 cent.

dc42

@o_lampe said in Duet smart effector directive drive on E3d titan aero:

But I have to calibrate it every time.
OTOH, I can switch on my CoreXY and start printing, no dropped bed, no problems with 1st. layer.

I calibrate mine every time too, but only because it takes less than 30 seconds. A single G30 probe after homing would probably be sufficient.

garyd9

I haven't had any need to re-calibration my delta excessively. I only recalibrate when I change between 2 build surfaces (because one is slightly thicker than the other) or when I lose power. The only reason I recalibrate on power loss is because RRF (for some reason) can't use the M665/M666 settings to determine how to re-apply mesh compensation. (It's been explained to me at least once, but I never understood it.) If I take off my (magnetic) build plate and replace it, I have no need to recalibrate.

No, it's not perfect (I have some backlash I've never been able to track down, and a bit of effector tilt only at the extreme edge between X and Z towers) but it's still extremely reliable.

I'm currently using an extruder I modified from @mrac1 (that he modified from early sherpa-mini models) mounted directly on the smart effector, with a printed bracket to change the arm distance to 74mm (otherwise the arms hit the little round nema14 motor.)

The rippling with the tiny extruder/motor is significantly less than when I tried hanging a titan aero from my (non smart) effector, but probably still greater than what a bowden would produce.

One of these days (I hope and pray) Duet3D will make a "Smart Effector Tool Board" that (if I'm really lucky) will use an arm distance >=74mm, and I'll be in delta heaven.

The only thing I use my cartesian for these days is when I need the enclosed build chamber.

dc42

@garyd9 said in Duet smart effector directive drive on E3d titan aero:

The only reason I recalibrate on power loss is because RRF (for some reason) can't use the M665/M666 settings to determine how to re-apply mesh compensation. (It's been explained to me at least once, but I never understood it.)

Can you link to a thread about that? I can't remember the reason either, and it might be good to fix it.

o_lampe

@garyd9
there's no need to defend Deltas, I just wanted to point out, how easy it is to loose all the inherent benefits by doing something wrong.
I know that extruder you mentioned. It's probably even better than hanging an Orbiter below the effector. Less tilt errors from play in the rods.
The above example also uses wider arm distance, but the bracket doesn't seem to be up to the task IMHO it could be beefier for such a heavy load...
But I like the Delrin balls. If I'd had them a few years ago, I could have built my Delrin Ball Effector in a different way...

garyd9

@dc42 said in Duet smart effector directive drive on E3d titan aero:

@garyd9 said in Duet smart effector directive drive on E3d titan aero:

The only reason I recalibrate on power loss is because RRF (for some reason) can't use the M665/M666 settings to determine how to re-apply mesh compensation. (It's been explained to me at least once, but I never understood it.)

Can you link to a thread about that? I can't remember the reason either, and it might be good to fix it.

I can't quickly find any of the older threads, so I just created a new one here:

https://forum.duet3d.com/topic/23172/delta-mesh-comp-without-g30

Thank you
Gary